for (int i = 0; i < 100000; i++) {
      SettableFuture<String> curr = SettableFuture.create();
      prev.setFuture(curr);
      prev = curr;
    }
    // prev represents the 'innermost' future
    prev.set("done");
    assertTrue(orig.isDone());
  }

  // Verify that StackOverflowError in a long chain of SetFuture doesn't cause the entire toString
  // call to fail
  @J2ktIncompatible

func isShrinkStackSafe(gp *g) bool {
	// We can't copy the stack if we're in a syscall.
	// The syscall might have pointers into the stack and
	// often we don't have precise pointer maps for the innermost
	// frames.
	if gp.syscallsp != 0 {
		return false
	}
	// We also can't copy the stack if we're at an asynchronous
	// safe-point because we don't have precise pointer maps for
	// all frames.